/*
 * Copyright (c) 2003-2010, Live Media Pty. Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *     conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice, this list of
 *     conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *  3. Neither the name of Live Media nor the names of its contributors may be used to endorse
 *     or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.argot.auto;

import java.io.IOException;

import com.argot.TypeBound;
import com.argot.TypeConstructor;
import com.argot.TypeElement;
import com.argot.TypeException;
import com.argot.TypeInputStream;
import com.argot.TypeLibrary;
import com.argot.TypeLibraryReader;
import com.argot.TypeMap;
import com.argot.TypeReader;
import com.argot.meta.MetaExpressionLibraryResolver;
import com.argot.meta.MetaExpressionResolver;
import com.argot.meta.MetaSequence;


public class TypeReaderAuto
implements TypeBound,TypeLibraryReader
{
	private MetaExpressionResolver _resolver;
	private TypeConstructor _constructor;
	private MetaSequence _metaSequence;
	
	public TypeReaderAuto( Class<?> clss )
	{
		_resolver = new MetaExpressionLibraryResolver();
		_constructor = new TypeConstructorAuto( clss );
		_metaSequence = null;
	}
	
	public TypeReaderAuto( TypeConstructor constructor )
	{
		_resolver = new MetaExpressionLibraryResolver();
		_constructor = constructor;
	}

	public void bind(TypeLibrary library, int definitionId, TypeElement definition) 
	throws TypeException 
	{
		if ( !( definition instanceof MetaSequence))
		{
			if (!(definition instanceof MetaSequence))
			{
				throw new TypeException( "TypeReaderAuto: required MetaSequence to read data." );
			}

			_metaSequence = (MetaSequence) definition;
			return;
		}
		_metaSequence = (MetaSequence) definition;
	}	
	
	private class TypeAutoReader
	implements TypeReader
	{
		private TypeReader _sequence;
		private MetaSequence _metaSequence;
		
		public TypeAutoReader( TypeReader sequence, MetaSequence metaSequence )
		{
			_sequence = sequence;
			_metaSequence = metaSequence;
		}
		
		public Object read(TypeInputStream in)
		throws TypeException, IOException
		{
			Object[] objects = (Object[]) _sequence.read( in );
			return _constructor.construct( _metaSequence, objects );									
		}
	}
	
	public TypeReader getReader(TypeMap map) 
	throws TypeException 
	{
		return new TypeAutoReader( _resolver.getExpressionReader(map, _metaSequence), _metaSequence );
	}



}
